code: def competition_mode(self, on):
      if on:
          self.config["use_salt"] = False
          self.config["cleanup"] = False
      else:
          self.config["use_salt"] = True
          self.config["cleanup"] = True
  
imports: from __future__ import print_function
  import os, pdb
  import xml.dom.minidom
  import numpy
  import scipy.sparse
  import scipy.io
  import pickle
  import subprocess
  from .imdb import imdb
  from .voc_eval import voc_eval
label_desc: Use image node_id 16 for calling the pascal_voc obj's underlying member method code with example usage: obj.competition_mode(on) without return types